Infineon Technologies TD425N16KOFXPSA1

Overview

TD425N16KOFXPSA1 from Infineon Technologies is a phase-control thyristor module designed for high-power AC line switching and rectification in industrial drive systems. It features 1600 V repetitive peak off-state voltage (VDRM/VRRM), 471 A average on-state current at TC = 85 °C, 14.5 kA non-repetitive surge current (ITSM), and electrically insulated baseplate construction. It is deployed in soft starters, UPS rectifiers, and static bypass switches requiring robust thermal performance and galvanic isolation.

For engineers reviewing the TD425N16KOFXPSA1 datasheet, TD425N16KOFXPSA1 pinout, TD425N16KOFXPSA1 application, or TD425N16KOFXPSA1 equivalent, key selection criteria include junction-to-case thermal resistance (0.065 K/W), gate trigger current (≤250 mA), critical dv/dt rating (1000 V/µs), and pressure-contact die attachment for reliability under cyclic thermal stress.

Technical Context

This dual-thyristor module operates in phase-controlled AC power regulation, where conduction angle determines output RMS voltage. Its 1600 V blocking rating supports operation on 690 VAC three-phase lines with safety margin, while the 125 °C maximum junction temperature enables sustained operation in forced-air or liquid-cooled enclosures.

The module uses pressure-contact silicon die mounting and aluminum nitride (AlN) baseplate insulation (Class I, IEC61140), delivering 3.0 kV RMS insulation test voltage. Gate control requires ≤1.5 V trigger voltage and tolerates up to 0.2 V non-triggering voltage at 0.5×VDRM, ensuring noise immunity in industrial EMI environments.

Key Specifications

Pinout & Package

TD425N16KOFXPSA1 is housed in an industrial-standard press-pack module with electrically insulated AlN baseplate and 60 mm × 60 mm footprint. Terminal layout follows dual-thyristor anti-parallel configuration for AC switching.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar phase-control thyristor module applications.

Compared with TT425N16KOFXPSA1 and SKKT 425/16 E, TD425N16KOFXPSA1 offers identical core specifications to TT425N but with enhanced supply chain traceability, and superior thermal and surge capability versus SKKT-critical for high-reliability drive and UPS designs.

Availability

TD425N16KOFXPSA1 is available at Aetrix Electronics and suitable for soft starters, UPS rectifiers, and static bypass switches requiring stable component supply, long-term lifecycle support, and certified industrial-grade isolation.

Supply support for TD425N16KOFXPSA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power semiconductors, microcontrollers, and sensor solutions for industrial, automotive, and renewable energy markets.

This part belongs to Infineon's high-power thyristor module product line, engineered for ruggedized AC power control in mission-critical industrial drives, uninterruptible power supplies, and grid-tied energy systems.

FAQ

What is the maximum allowable case temperature for continuous operation?

The maximum case temperature (TC) is +125 °C, validated per IEC 60747-6. At this temperature, the device sustains 471 A average on-state current per arm with sinusoidal conduction (180°). Derating applies below 180° conduction angles-e.g., 600 A at 120° for same TC.

Does TD425N16KOFXPSA1 require external snubbers in typical phase-control applications?

Snubbers are not mandatory due to its 1000 V/µs critical dv/dt rating and 250 µs turn-off time (tq), which suppress commutation-induced transients. However, RC snubbers are recommended for inductive loads with di/dt > 100 A/µs or when operating near VDRM limits to ensure reliable commutation.

How is gate drive isolation implemented for this module?

Each thyristor arm has dedicated gate (G1/G2) and cathode reference (K1G/K2G) terminals. Isolation is achieved using transformer-coupled or opto-isolated gate drivers rated for ≥5 kV transient isolation, matching the module's 3.0 kV RMS insulation barrier. No shared gate return path is permitted.

Can TD425N16KOFXPSA1 be used in parallel configurations?

Parallel operation is not recommended. The module lacks integrated current-sharing features such as matched dynamic parameters or emitter ballasting. Parallel use risks thermal runaway due to parameter spread-even within same batch-and violates Infineon's application guidance for press-pack thyristors.